- #1
Physicsphysics
- 17
- 2
I've come across countless equations in which i and j are written as either subscript or superscript or both. I am an AS level student (16 - 17 yrs old), and all I know is that i, j and k are unit vectors, but I've never seen them written as subscript or superscript and I'd like to understand what that notation means and how it differs from what I've seen in class.
This is the equation I am currently trying to decipher:
dl2 = gij dxi dxj
Which is in this document:
http://www2.warwick.ac.uk/fac/sci/physics/current/teach/module_home/px436/notes/lecture20.pdf
Thanks in advance ^-^
This is the equation I am currently trying to decipher:
dl2 = gij dxi dxj
Which is in this document:
http://www2.warwick.ac.uk/fac/sci/physics/current/teach/module_home/px436/notes/lecture20.pdf
Thanks in advance ^-^